package com.xue.tools;

import com.xue.singleton.Student;

public class TestObject {
    public static void main(String[] args) {
        /*Student stu0=new Student();
        System.out.println("stu0.hashCode::"+stu0.hashCode());
        Student stu1=new Student();
        System.out.println("stu1.hashCode::"+stu1.hashCode());*/

       //在IDEA 中查看 Object 类 的源码  快捷键是::  ctrl+鼠标左键
        Object obj=null;
    }
}
